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Finding the Fourth Proportional to 72,700.39, 100,403.02 and 64,775.40

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Solution

The fourth proportional to 72,700.39, 100,403.02 and 64,775.40 is: 89,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.39 : 100,403.02 = 64,775.40 : x
  2. Step 2: Convert to fraction form
    72,700.39/100,403.02 = 64,775.40/x
  3. Step 3: Cross multiply
    72,700.39x = 100,403.02 × 64,775.40
  4. Step 4: Simplify right side
    72,700.39x = 6,503,645,890.00
  5. Step 5: Solve for x
    x = 6,503,645,890.00/72,700.39
  6. Step 6: Final answer
    x = 89,458.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.